CDRIVER-690 fix typo in error check
CDRIVER-690 fix typo in error check

rayyang2000/libbson,rayyang2000/libbson,alexeyvo/libbson,ksuarz/libbson,Machyne/libbson,mapr/libbson,Machyne/libbson,jqk6/libbson,bjori/libbson,mongodb/libbson,Machyne/libbson,ajdavis/libbson,rcsanchez97/libbson,Convey-Compliance/libbson,Convey-Compliance/libbson,rcsanchez97/libbson,jqk6/libbson,Machyne/libbson,jqk6/libbson,mongodb/libbson,mapr/libbson,paulmelnikow/libbson,ksuarz/libbson,paulmelnikow/libbson,ajdavis/libbson,rayyang2000/libbson,bjori/libbson,paulmelnikow/libbson,alexeyvo/libbson,Convey-Compliance/libbson,ksuarz/libbson,paulmelnikow/libbson,rayyang2000/libbson,rcsanchez97/libbson,paulmelnikow/libbson,bjori/libbson,alexeyvo/libbson,mapr/libbson,mongodb/libbson,jqk6/libbson,ajdavis/libbson